WebM support for new multipart VP9 string.

media/base/media.cc

Index: media/base/media.cc
diff --git a/media/base/media.cc b/media/base/media.cc
index 77720b44a0a24255d10808980b8cbe6e1ebd667c..23fedb332418736114bf19d8a753939a71347139 100644
--- a/media/base/media.cc
+++ b/media/base/media.cc
@@ -57,6 +57,14 @@ class MediaInitializer {
   }
 #endif  // defined(OS_ANDROID)
 
+  void enable_new_vp9_codec_string_support() {
+    has_new_vp9_codec_string_support_ = true;
+  }
+
+  bool has_new_vp9_codec_string_support() {
+    return has_new_vp9_codec_string_support_;
+  }
+
  private:
   ~MediaInitializer() = delete;
 
@@ -64,6 +72,8 @@ class MediaInitializer {
   bool has_platform_decoder_support_ = false;
 #endif  // defined(OS_ANDROID)
 
+  bool has_new_vp9_codec_string_support_ = false;
+
   DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
 };
 
@@ -90,4 +100,12 @@ bool PlatformHasOpusSupport() {
 }
 #endif  // defined(OS_ANDROID)
 
+void EnableNewVp9CodecStringSupport() {
+  GetMediaInstance()->enable_new_vp9_codec_string_support();
+}
+
+bool HasNewVp9CodecStringSupport() {
+  return GetMediaInstance()->has_new_vp9_codec_string_support();
+}
+
 }  // namespace media